The Intermolecular Interaction

Abstract

In a macroscopic system of hydrogen molecules the interaction between the molecules is responsible for the transition of the system with decreasing temperature from the gaseous into the liquid and ultimately into the solid state, and the properties of the solid are determined by this interaction and by its effect on the internal properties of the molecules. The intermolecular interaction thus plays a central role in the study of the solid hydrogens, and in this chapter we outline the present state of knowledge in this field.